ChiXX0r describes a girl with l33t h4xX0r 5k1llZ. Canadian ChiXX0r is, therefore, a ChiXX0r from Canada.
This term was originally coined to describe Starreh, the original Canadian ChiXX0r.
Person 1: That ChiXX0r was so l33t, she ownZed me in CS. Later on I found out she was from Canada.
Person 2: Lmfao. You got pwned by Starreh?